fix #7273: enable dbt show for seeds (#7544)

.changes/unreleased/Fixes-20230508-044922.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: enable dbt show for seeds
+time: 2023-05-08T04:49:22.82093-07:00
+custom:
+  Author: aranke
+  Issue: "7273"

core/dbt/task/show.py

@@ -2,12 +2,14 @@
 import threading
 import time
 
+from dbt.contracts.graph.nodes import SeedNode
 from dbt.contracts.results import RunResult, RunStatus
 from dbt.events.base_types import EventLevel
 from dbt.events.functions import fire_event
 from dbt.events.types import ShowNode, Note
 from dbt.exceptions import DbtRuntimeError
 from dbt.task.compile import CompileTask, CompileRunner
+from dbt.task.seed import SeedRunner
 
 
 class ShowRunner(CompileRunner):
@@ -41,8 +43,11 @@ def _runtime_initialize(self):
             raise DbtRuntimeError("Either --select or --inline must be passed to show")
         super()._runtime_initialize()
 
-    def get_runner_type(self, _):
-        return ShowRunner
+    def get_runner_type(self, node):
+        if isinstance(node, SeedNode):
+            return SeedRunner
+        else:
+            return ShowRunner
 
     def task_end_messages(self, results):
         is_inline = bool(getattr(self.args, "inline", None))

tests/functional/show/test_show.py

@@ -87,6 +87,10 @@ def test_second_ephemeral_model(self, project):
         )
         assert "col_hundo" in log_output
 
+    def test_seed(self, project):
+        (results, log_output) = run_dbt_and_capture(["show", "--select", "sample_seed"])
+        assert "Previewing node 'sample_seed'" in log_output
+
 
 class TestShowModelVersions:
     @pytest.fixture(scope="class")